Mass sensor based on split-nanobeam optomechanical oscillator

Yeping Zhang; Jie Ai; Yanjun Xiang; Qinghua He; Tao Li; Jingfang Ma

doi:10.1117/12.2264591

8 March 2017 Mass sensor based on split-nanobeam optomechanical oscillator

Yeping Zhang, Jie Ai, Yanjun Xiang, Qinghua He, Tao Li, Jingfang Ma

Proceedings Volume 10255, Selected Papers of the Chinese Society for Optical Engineering Conferences held October and November 2016; 102552U (2017) https://doi.org/10.1117/12.2264591
Event: Selected Papers of the Chinese Society for Optical Engineering Conferences held October and November 2016, 2016, Jinhua, Suzhou, Chengdu, Xi'an, Wuxi, China

Abstract

Mass sensing based on monitoring the frequency shifts induced by added mass in oscillators is a well-known and widely used technique. The optomechanical crystal cavity has strong interaction between optical mode and mechanical mode. Radiation pressure driven optomechanical crystal cavity are excellent candidates for mass detection due to their simplicity, sensitivity and all optical operation. In an optomechanical crystal cavity, a high quality factor optical mode simultaneously serves as an efficient actuator and a sensitive probe for precise monitoring the mechanical frequency change of the cavity structure. Here, a split-nanobeam optomechanical crystal cavity is proposed, the sensing resolution as small as 0.33ag (1ag=10^-21kg) and the frequency shift is more than 30MHz. This is important and promising for achieve ultimate-precision mass sensing including proteins and other molecules.

Citation Download Citation

Yeping Zhang, Jie Ai, Yanjun Xiang, Qinghua He, Tao Li, and Jingfang Ma "Mass sensor based on split-nanobeam optomechanical oscillator", Proc. SPIE 10255, Selected Papers of the Chinese Society for Optical Engineering Conferences held October and November 2016, 102552U (8 March 2017); https://doi.org/10.1117/12.2264591

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